______ the beginning of the 19th century did scientists know that all matter is made up of atoms.

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• 1— What has Tom been doing recently? — I don't know, _____ care.

  A.nor do I

  B.nor I do

  C.neither am I

  D.neither I am

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• 2Only when he failed the exam ______ that he didn't work hard.

  A.he regretted

  B.did he regret

  C.had he regretted

  D.does he regret

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• 3_____ I shouted at the top of my voice _____ turn his head.

  A.Not until; did he

  B.Not until; he did

  C.Until; he did not

  D.Until; did he not

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• 4-----His letter arrived a month ago. ______ to Peter?  ----- Yes. You know, I have been busy in preparing for the final exam all the time.   

  A.Didn't you write

  B.Don't you write

  C.Hadn't you written

  D.Haven't you written

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• 5— Won't you stay for the dinner tonight?—_____, much as I'd like to.

  A.Yes I can.

  B.No, I can't.

  C.Yes, I will.

  D.No, I won't.

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• 6— David has made great progress recently. — ________ , and ________.

  A.So he has, so you have

  B.So he has, so have you

  C.So has he, so have you

  D.So has he, so you have

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• 7Only when the meeting began _________ that he had left his papers at his office.

  A.will he realize

  B.he did realize

  C.did he realize

  D.should he realize

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• 8_____, he talks a lot about his favorite singers after class.

  A.A quiet student as he may be

  B.Quiet student as he may be

  C.Be a quiet student as he may

  D.Quiet as he may be a student

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• 9Hardly _____ he got out of the court _____ the reporters raised a lot of questions to him.

  A.had … when

  B.had…than

  C.did…when

  D.has…than

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• 10So clearly _____ that I was able to understand much of what he said.

  A.did he say

  B.he told

  C.did he speak

  D.he talked

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